---
title: "Free Tools and Calculators"
date: 2026-10-08
author: "Barry Elad"
---

# Free Tools and Calculators

Every tool below is free to use with no signup, and each tool’s page states where it runs.

Updated Oct 20, 2026

  [Security Calculators 2](#wpth-cat-security-calculators) [Network Tools 3](#wpth-cat-network-tools) [AI Tools 1](#wpth-cat-ai-tools)  ## Security Calculators

 2 tools 

Uptime, download-time and password math for security and infrastructure teams.

- [   Downtime a year At 99.9%  8h 45m 58s     Security In your browser  Uptime Calculator Downtime an uptime target allows, from a day to a year.  43m 50sPer average month (30.44 days) →   ](https://sqmagazine.co.uk/uptime-calculator/)
- [   Download time 50 GB at 300 Mbps  24m 41s DSL 10 Mbps 12h 20m 44sFiber 1 Gbps 7m 24s    Security In your browser  Download Time Calculator How long a file takes at your connection speed.  270 MbpsEffective speed →   ](https://sqmagazine.co.uk/download-time-calculator/)
 
  ## Network Tools

 3 tools 

Lookups and converters for addresses, records and connections.

 [  Featured network tool What Is My IP Address See the address websites see for you, with your provider, location and connection, the moment the page opens.  IPv4 or IPv6 Provider and ASN Approximate location Time zone   Open the tool → Free, at the network edge     Your connection Nothing to type*Read at the network edge*  Detected the moment you open it Your public IP address  Live  Internet provider Approximate location Time zone Connection    ](https://sqmagazine.co.uk/what-is-my-ip/)- [   Network 192.168.1.10/24  192.168.1.0/24     Network In your browser  IP Subnet Calculator Network, broadcast, host range and mask for any IPv4 block.  254Usable hosts →   ](https://sqmagazine.co.uk/subnet-calculator/)
- [   SPF record Example: example.com  v=spf1 -all DMARC: p=reject    Network Public DNS lookup  TXT Record Lookup TXT, SPF and DMARC records for any domain.  SPF and DMARC read outAny public domain →   ](https://sqmagazine.co.uk/txt-record-lookup/)
 
  ## AI Tools

 1 tool 

Token counts for working with large language models, computed in your browser.

 [  Featured AI tool Token Counter Paste a prompt or a document; get exact token counts in the encodings OpenAI models use.  o200k and cl100k Counted in your browser Characters per token   Open the tool → Free, in your browser     Text and tokenizer Paste a prompt, a system message or a document here to count its tokens.*GPT-5, GPT-4o*  16 Tokens   Characters72 Words14 Characters per token4.5    ](https://sqmagazine.co.uk/token-counter/)